exp: 轮次33(上)——实际执行速度做成一等指标并自证；默认路径逐位复现第30轮，256题全部超VMAX

- rollout 逐题记录 max|Δq|/STEP（1.0=VMAX）与每步速度变化比；eval_cl 汇总 p50/p95/max、over_vmax_rate
- 自证：用 round30_after trace 独立重算得 1.660004×VMAX、超速度占比 1.0，与新指标逐位一致
- 默认参数下 base 复现第30轮 after 的每个旧指标（0.57421875/0.390625/19.25/2.444952726/0.209975064 等）
- 新开关 inc_cap（反馈叠加后再按每轴 VMAX·DT 限幅）、gap_margin（余量门限+自动抬宽相位 cap，
  否则现 cap=0.5 会让 >0.5 的余量恒假）；col 仍按 gap<=0 判真实碰撞，不与余量混用
- 只读核查：ik-policy.js:355 同样在 ±1·STEP 之后叠加反馈；JS 的 5 mm 余量是投影式护栏，非同机制
- 口径提醒：round30 plans['gaps'] 在 cap=0.5 截顶，不能据此算"≥1mm 占比"；中位最小间隙 0.046 mm 可用
- 测试 26→30 项（限幅灵敏度、余量拒/受、cap 抬升生效）

docs/experiment_round33_base.json

@@ -0,0 +1,70 @@
+{
+  "config": {
+    "ckpt": "ml/runs/base_dag2_dag1/best.pt",
+    "samples": "ml/data/samples",
+    "tasks": null,
+    "split": "val",
+    "n": 256,
+    "K": 8,
+    "commit": 2,
+    "fb": 2.2,
+    "ki": 0.0,
+    "fb_scale": 0.0,
+    "fb_near": 0.2,
+    "fb_fallback": 0.0,
+    "kdecay": 0.9,
+    "kimax": 0.5,
+    "fb_every": 1,
+    "safety_try": 0,
+    "sel_w": 0.1,
+    "dls_safety": 1,
+    "fb_clear": 0.0,
+    "fb_cmin": 0.3,
+    "sub_refresh": 0,
+    "fb_block_gain": 0.5,
+    "dump": "ml/runs/round33_base_rows.json",
+    "out": "docs/experiment_round33_base.json",
+    "trace": "ml/runs/round33_base.pt",
+    "select": "endpoint",
+    "replan": "empty",
+    "safety": 1,
+    "partial": 1,
+    "inc_cap": 0,
+    "gap_margin": 0.0,
+    "max_sec": null,
+    "seed": 0,
+    "dls": "analytic",
+    "device": "cuda"
+  },
+  "batch_size": 256,
+  "batch_seed_rule": "same seed per batch",
+  "checkpoint_sha256": "f7f686fd8ee92fb6948fbcc4ee954636065ad87bb54f661c4f8f575bc16c2ce1",
+  "tasks_sha256": "249bd93457825cda98c59e64d9a096d3473c69aeb3553de1dea6d9e56be71772",
+  "kin_fp": "2ebcbf17",
+  "act_scale": 1.0,
+  "metrics": {
+    "n": 256,
+    "n_ref": 256,
+    "success": 0.57421875,
+    "collision_free_success": 0.57421875,
+    "time_ok_1p3": 0.390625,
+    "collision_rate": 0.0,
+    "collision_steps_mean": 0.0,
+    "travel_ratio_median": 2.4449527263641357,
+    "time_mean_s": 2.3076188564300537,
+    "brakes_mean": 19.25,
+    "start_fail": 0.0,
+    "goal_ratio_2s": 0.20997506380081177,
+    "err_fail_med": 229.68746948242188,
+    "err_success_med": 0.18899640440940857,
+    "dls_share": 0.625,
+    "time_budget": "teacher×2(≥3 s)",
+    "speed_ratio_p50": 1.6600004434585571,
+    "speed_ratio_p95": 1.6600035429000854,
+    "speed_ratio_max": 1.660003662109375,
+    "over_vmax_rate": 1.0,
+    "accel_ratio_p95": 1.5835107564926147,
+    "accel_ratio_max": 1.6600004434585571
+  },
+  "simulation_wall_s": 296.2702505999914
+}